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Astronomy Archive
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Between the Galaxies
Question: What if any thing is in between galaxies, besides space?
How much cooler are sunspotsthan the actual surface of the sun?
Why is the sky sometimes green?
How are satellites named?
bryan matthewkarp
Answer: "empty" space between galaxies (extra-galactic space) actually
contains about one hydrogen atom per cubic meter. Inter-galactic
space contains about one hydrogen atom per cubic cm.
The surface temperature of the sun is 5770 deg. Kelvin; sunspots
are about (?) 1000 degrees cooler. the sun's photosphere (higher
up in the sun's atmosphere) can get to over 10 million degrees!
john
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